Sharp R-231F Service Manual

R-231F
16
Pin No. Signal I/O Description
24 K00 IN Signal similar to K02.
When either G8 line on key matrix is touched, a corresponding signal will be input
into K00.
25 K01 IN Signal similar to K02.
When either G9 line on key matrix is touched, a corresponding signal will be input
into K01.
26 K02 IN Signal coming from touch key.
When either G10 line on key matrix is touched, a corresponding signal out of R00,
R01, R02, R03, P20 and P21 will be input into K02. When no key is touched, the
signal is held at “H” level.
27 K03 IN Signal synchronized with commercial power source frequency.
This is the basic timing for time processing
of LSI.
28 COM0 OUT Common data signal: COM0.
Connected to LCD (Pin No. COM1)
29 COM1 OUT Common data signal: COM1.
Connected to LCD (Pin No. COM2)
30 COM2 OUT Common data signal: COM2.
Connected to LCD (Pin No. COM3)
31 COM3 OUT Terminal not used.
32-33 SEG0-SEG1 OUT Terminal not used.
34 SEG2 OUT Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay
(RY2). The signals holds “L” level
during microwave cooking and “H”
level while not cooking. In other cook-
ing modes (variable cooking) the sig-
nal turns to “H” level and “L” level in
repetition according to the power level.
35 SEG3 OUT Terminal not used.
36 SEG4 OUT Oven lamp, fan motor and turntable motor driving signal.
To turn on and off shut off relay (RY1).
The square waveform voltage is deliv-
ered to the RY1 driving circuit and RY2
control circuit.
37-39 SEG5-SEG7 OUT Terminal not used.
40-51 SEG8-SEG19 OUT Segment data signal.
Connected to LCD.
The relation between signals are as follows:
LSI signal (Pin No.) LCD segment LSI signal (Pin No.) LCD segment
SEG 8 (40)
....................
SEG 12 SEG 14 (46)
.....................
SEG 6
SEG 9 (41)
....................
SEG 11 SEG 15 (47)
.....................
SEG 5
SEG 10 (42)
....................
SEG 10 SEG 16 (48)
.....................
SEG 4
SEG 11 (43)
....................
SEG 9 SEG 17 (49)
.....................
SEG 3
SEG 12 (44)
....................
SEG 8 SEG 18 (50)
.....................
SEG 2
SEG 13 (45)
....................
SEG 7 SEG 19 (51)
.....................
SEG 1
52-53 VC1-VC2 IN Power source voltage input terminal.
Standard voltage for LCD.
54 VC3 OUT Terminal not used.
GND
-5V
20.0 msec.
H : GND
L : -5V
OFF
ON
ON
OFF
OFF
H : GND
L : -5V
Maximum
output
70% of maximum
output
24 sec.
8 sec.
During cooking
L : -5V
H : GND
20.0 msec.

Sharp R-231F Specifications

Power

AC power required	1.21 kW
output power	800 W
microwave frequency	2450 MHz

Weight and Dimensions

outside width	460 mm
outside height	275 mm
outside depth	353 mm
cavity width	322 mm
cavity height	212 mm
cavity depth	336 mm
weight	12 kg